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The following connector has an especially deep socket. Use care when disconnecting it.

Carefully peel the I/O board cable from the top of the fan.

While gently pulling the I/O board cable upward near its connection to the logic board, use the tip of a spudger to pry upward on alternating sides of the connector to help "walk" it out of its socket.

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Before removing the last display screw, be sure to hold the display and upper case steady with your other hand. Failure to do so may allow the components to fall onto the table, causing potentially expensive damage.

Remove the last 4.9 mm T8 Torx screw securing the display to the upper case.

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Push the upper case slightly toward the display assembly, then rotate it away from the front of the display assembly.

Once the two display hinges have cleared the upper case, remove the display and set it aside.

Keep track of the shims under each of the two display brackets. When installing the display, be sure a shim is installed under each display bracket (against the upper case) as shown in the second picture.

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I'm pretty experienced in dismantling/reassembling Aluminum MacBook Pros, plastic MacBooks, aluminum Powerbooks and various iBooks and this was not bad at all. Mostly just time-consuming.

I'm not sure I'd rate it as "difficult" for those with previous experience. The screw count is particularly low by comparison to other machines I've worked on, and there are only a few different types of screw.

The new top case arrived with the adhesives to re-secure the speakers, new screws to attach the trackpad, and the microphone was pre-installed.

I just repaired my mba after spilling some juice on it... I did it in about 2hours, i kept track of the screws in each step and i must say it wasn't difficult at all, and i have no experience with computer so.. Just be careful with some wires and when you disconnect the monitor but that's all. I'm so happy my mba works again! The upper case and the tools arrived very quick and with adhesives and some extra screws (much appreciated since the stock screws were kind of damaged and i had to break one) for the trackpad. Thanks ifixit!

Just completed the upper case replacement today due to a failed keyboard and also a failed touch pad (due to liquid damage). Took a few hours to take it apart (and be careful as I was doing it) found hardest part was keeping track of screws and parts. I ended up using plastic red/white Solo cups with the Step # written on each cup (so you don't confuse the screws per step). Undoing the retaining clips for ribbon wires was hardest part highly recommend using a spudger with a fine tip as these are very tiny parts.

The instructions were great. I used a white plastic ice-tray to hold the screws and fill each cube up sequentially. All you have to do, is work backwards through the recesses to where you started. No way to mix things up and hard to tip over.